<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">

var b = function (){};
alert(typeof b);	//Object //function
var a = Object();
alert(typeof a);    //Window //Object
//function Object String Number Boolean undefined Symbol


</script>
</body>
</html>